ISL6442 INTERSIL [Intersil Corporation], ISL6442 Datasheet
ISL6442
Available stocks
Related parts for ISL6442
ISL6442 Summary of contents
Page 1
... Data Sheet Dual (180° Out-of-Phase) PWM and Linear Controller The ISL6442 is a high-performance, triple output controller that provides a single high-frequency power solution primarily for Broadband, DSL and Networking applications. This device integrates complete control, monitoring and protection functions for two synchronous buck PWM controllers and one linear controller ...
Page 2
... REFERENCE BIAS CURRENT 30µA 100µA 0.6V COMP1 FB1 0.6V VCC5 VCC5 30µA 30µA SS1/EN1 SS2/EN2 0.6V FB2 COMP2 RT PGOOD SGND 2 ISL6442 VCC VCC POWER ON 5V LINEAR RESET REGULATOR AND CONTROL FAULT1 UVP1 OVP1 PG1 EN1 SS1 STARTUP SS1 EN1 1V DET SS2 EN2 FAULT2 ...
Page 3
... VCC COMP1 101 FB1 R 100 COMP2 201 FB2 R ISL6442 200 VCC PGOOD RT SS1/EN1 SS2/EN2 R RT SGND PGND FIGURE 2. ISL6442 TYPICAL APPLICATION VIN OPTIONAL CONNECTION (FOR VIN = VCC = 5V) R OCSET1 VIN1 = VIN VIN OCSET1 C OCSET1 BOOT1 C BOOT1 C Q IN1 101 UGATE1 L PHASE1 ...
Page 4
... Rising Threshold V POR_r Falling Threshold V POR_f 4 ISL6442 Thermal Information Thermal Resistance (Typical, Note 2) QSOP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum Junction Temperature (Plastic Package).-55°C to +150°C Maximum Storage Temperature Range . . . . . . . . . .-65°C to +150°C Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C Pb-Free Reflow Profile .see link below http://www ...
Page 5
... LCDR LCFB Feedback Threshold V LCFB LCFB Input Leakage Current I LCFB PGOOD Power-Good Lower Threshold PG_low Power-Good Higher Threshold PG_hi 5 ISL6442 TEST CONDITIONS (Note 3) VIN = 4.5 or 12V 300kHz SW VIN = 4.5V 2.5MHz SW (Note 3) VIN = 5V or 12V 52.3kΩ VIN = 24V 52.3kΩ VIN = 5V 5.23kΩ VIN = 12V 5.23kΩ ...
Page 6
... Design guideline only; not production tested. Typical Performance Curves 0.65 0.64 0.63 0.62 0.61 0.60 0.59 0.58 0.57 0.56 0.55 -40 - TEMPERATURE (°C) FIGURE 3. REFERENCE VOLTAGE VARIATION OVER TEMPERATURE 6 ISL6442 TEST CONDITIONS LDO enabled, PGOOD for LDO; 3 Ch1 and Ch2 disabled; (Note 3) (Note 3 1.4MHz 5.5V PULLUP I = -4mA PGOOD (Note 4) (Note 4) 4.0 3.5 3.0 2.5 2.0 1 ...
Page 7
... Connect the input supply to the VCC pin. 7 ISL6442 VCC (Pin 19) - This pin supplies the bias for the regulators, powers the low side gate drivers and external boot circuitry for high side gate drivers. The IC may be powered directly from a single 5V (± ...
Page 8
... GND> GND> FIGURE 5. SOFT-START The soft-start ramps for each output can be selected independently, but the ISL6442 also has voltage tracking capability. By selecting the soft-start capacitance to be proportional to the output voltage, the output voltage can be tracked. For example, in Figure 6, SS1 capacitor = 0.18µF and SS2 capacitor = 0.33µ ...
Page 9
... If the output is pre-biased above the OVP level, the ISL6442 will go into OVP at the end of soft-start, which will keep the FETs off. The output can recover if the voltage goes below the UV (Undervoltage) trip point, at which time a retry will occur ...
Page 10
... V FB – OUT The maximum duty cycle of the ISL6442 approaches 100% at low frequency, but falls off at higher frequency; see the “Electrical Specifications” Table on page 5. In addition, there is a minimum UGATE pulse width, in order to properly sense overcurrent. The two switchers are 180° out of phase. ...
Page 11
... Given a sufficiently fast control loop design, the ISL6442 will provide either 0% or 100% duty cycle in response to a load transient. The response time is the time required to slew the inductor current from an initial current value to the transient current level ...
Page 12
... The RMS current rating requirement for the input capacitor of a buck regulator is approximately 1/2 the DC load current. SWITCHER MOSFET SELECTION V for the ISL6442 has a wide operating voltage range IN allowed, so both FETs should have a source-drain breakdown voltage (V ) above the maximum supply DS voltage expected ...
Page 13
... CE 2π The compensation network consists of the error amplifier (internal to the ISL6442) and the external R1-R3, C1-C3 components. The goal of the compensation network is to provide a closed loop transfer function with high 0dB crossing frequency (F ; typically 0 margin (better than 45°). Phase margin is the difference ...
Page 14
... MODULATOR GAIN COMPENSATION GAIN CLOSED LOOP GAIN The compensation network is composed of R300, C300, the OPEN LOOP E/A GAIN internal circuitry of the ISL6442, β (also know as h sheets) of the pass element, and the Miller capacitance of the pass element. The pole is located at ⋅ ...
Page 15
... Please note that the capacitors C and C each represent numerous physical capacitors. OUT Locate the ISL6442 within 1 inch of the MOSFETs, Q1 and Q2. The circuit traces for the MOSFETs’ gate and source connections from the ISL6442 must be sized to handle peak current. ...
Page 16
... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see www.intersil.com 16 ISL6442 M24.15 24 LEAD SHRINK SMALL OUTLINE PLASTIC PACKAGE M ...